The setting is per FirebaseApp, and therefore per Vision, and it is persistent across
launches of the app. It means if the user uninstalls the app or clears all app data, the setting
will be erased. The best practice is to set the flag in each initialization.

By default the logging is enabled. You have to specifically set it to false to disable
logging.

Declaration

Gets an instance of Firebase Vision service for the default Firebase app. This method is thread
safe. The default Firebase app instance must be configured before calling this method; otherwise,
raises FIRAppNotConfigured exception.

Declaration

Swift

classfuncvision()->Self

Return Value

A Firebase Vision service instance, initialized with the default Firebase app.